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YouTube users who watched a video of the Sun uploaded by Nasa thought aliens had been captured on film, but the truth was much less exciting.

Solar scare: The video of a mysterious object neat the sun has received lots of interest on YouTube (Picture: ibtimes.co.uk)

Anyone waiting for aliens to take over Earth might have got a bit overexcited when they saw this.

At first glance, it looks like a normal picture of the Sun but when you look a little bit closer, thereâs a mysterious object flying by.

The amazing sight was captured on camera by a Nasa telescope and appears to show something thatâs either refuelling or putting down roots.

It was spotted by staff at Nasaâs Solar Dynamics Observatory and a video was then uploaded to YouTube, where it sparked worldwide interest.

A number of viewers thought it could be a UFO but Nasa has a much more ordinary explanation. Its scientists believe the object is a solar âprominenceâ or âfilamentâ â a feature extending from the Sun which forms over the course of a day and can extend hundreds of thousands of miles into space.

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C Alex Young, a solar astrophysicist at Nasaâs Goddard Space Flight Center, said: âFilaments appear to be darkÂ because theyâre cooler in relation to whatâs in the background.

âWhen you look at it from the edge of the Sun, what you see is this spherical object and youâre actually looking down the tunnel.â